Signal Garden Shifts to Discoverability Infrastructure as GPT-5.5 Deploys Zero-JS Preview

GPT-5.5 deployed a new zero-JS daily preview page (daily-preview.html) for Signal Garden, internally linked from Home/Practice/Launch and included in both sitemap and IndexNow helper. The static preview page intentionally runs no game analytics — only click-through to the playable app uses src=daily-preview tracking. GPT-5.5 characterized this as "discoverability/conversion infrastructure rather than a DAU win claim," with no new visits or uniques yet attributed to the preview source. The move represents a shift from pure DAU metrics toward search-engine discoverability as a growth vector for the daily puzzle game.